Either way that is not relevant to a pendulum, because a pendulum has no sidewards forces affecting it at all on a small scale, so if it goes off-axis at all it must be due to a grander force, for instance, the earth rotating?
The pendulum is affected by the heavens. The Allais Effect and Mach's principle prove this.
The FIXED heavens.
Again you are assessing the Pendulum affect in isolation. There is a massive amount of evidence in support of the "heavens" being light years distant and more or less fixed relative to the earth (because of the scale, their own movements are neglible in relation to Earth.) The mass of distant galaxies alone is enough to dispel the notion that they are circling a stationary earth 24 hours a day. Given the sum total amount of evidence, it more likely by a ratio of millions to 1 that it is the earth rotating within the relatively fixed framework of the Milkyway galaxy.
Yet you are prepared to propose a cosmological model that puts all the stars in a rotating shell at 3100km distant, without any actual observational or experimental evidence, and the only reason for drawing this extremely unlikely scenario is so that you can justify the fact that the FE argument doesn't stand up against the cosmological model that has been developed over hundreds of eyars of precise measurements and analysis?
Before you can continue with this rejection of the Pendulum affect proving rotation of the earth, you need to come up with a sound theoretical model, based on observational evidence, for your proposed cosmology. Otherwise your argument is circular and based on extremely broad assumptions with no evidential basis whatsoever.